Following their cameo in "Daemul" alongside actress Go Hyun Jung, the ladies of Rainbow have earned the opportunity of working with another famous actress, Kim Yun Jin. Rainbow will be making a cameo appearance in Kim Yun Jin and Park Hae Il's upcoming movie, "My Heart's Beating," as the favorite singers of Kim's daughter. The Rainbow members commented, "We thought it was such an honor to be able to work with Go Hyun Jung and Kwon Sang Woo in 'Daemul,' so it's exciting to receive this second privilege in working with world star Kim Yun Jin as well.." They continued, "Whenever they're speaking with us, they're always so kind and seem like next-door neighbors or friends. But the minute they get into filming, they become so charismatic. They're such respectable people, and we believe that people should really anticipate this movie." "My Heart's Beating" tells the story of 'Yeon Hee' (Kim Yun Jin), the mother of a dying child, and 'Hwi Do' (Park Hae Il), the town gangster and son to a dying mother. It's scheduled for release January 6th, 2011. Source: Star News via Nate